DESCRIPTION
There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
Symptom | Trouble Area |
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Resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is below 54 Ω. |
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
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DTC check procedure: Turn the power switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
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HINT:
PROCEDURE
1. | CHECK FOR SHORT IN CAN BUS LINES (NO. 1 JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the N97 No. 1 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 1 Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
*c | to Headlight ECU Sub-assembly RH | *d | to Outer Mirror Control ECU Assembly RH (w/ Seat Position Memory System) |
*e | to No. 8 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N97-8 (CANH) - N97-19 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Central gateway ECU (network gateway ECU) |
N97-9 (CANH) - N97-20 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Headlight ECU sub-assembly RH |
N97-10 (CANH) - N97-21 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Outer mirror control ECU assembly RH* |
N97-11 (CANH) - N97-22 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 8 CAN junction connector |
Result | Proceed to |
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OK | A |
NG (Line to central gateway ECU (network gateway ECU)) | B |
NG (Line to No. 8 CAN junction connector) | C |
NG (Line to ECU or sensor) | D |
A | REPLACE NO. 1 JUNCTION CONNECTOR |
C | GO TO STEP 3 |
D | GO TO STEP 6 |
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2. | CHECK FOR SHORT IN CAN BUS LINES (NO. 1 JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the G66 central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 1 Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
N97-8 (CANH) - N97-19 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
OK | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. | CHECK FOR SHORT IN CAN BUS LINES (NO. 8 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N97 No. 1 junction connector.
(b) Disconnect the N101 No. 8 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 8 CAN Junction Connector) | *b | to Outer Mirror Control ECU Assembly LH (w/ Seat Position Memory System) |
*c | to Luggage Closer Motor Assembly (w/ Power Trunk Lid System) | *d | to No. 5 CAN Junction Connector |
*e | to No. 1 Junction Connector | *f | to Position Control ECU Assembly LH (w/ Seat Position Memory System) |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N101-1 (CANH) - N101-7 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Outer mirror control ECU assembly LH*1 |
N101-2 (CANH) - N101-8 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Luggage closer motor assembly*2 |
N101-3 (CANH) - N101-9 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 5 CAN junction connector |
N101-4 (CANH) - N101-10 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 1 junction connector |
N101-5 (CANH) - N101-11 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Position control ECU assembly LH*1 |
Result | Proceed to |
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OK | A |
NG (Line to No. 1 junction connector) | B |
NG (Line to No. 5 CAN junction connector) | C |
NG (Line to ECU or sensor) | D |
A | REPLACE NO. 8 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
D | GO TO STEP 6 |
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4. | CHECK FOR SHORT IN CAN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N101 No. 8 CAN junction connector.
(b) Disconnect the G97 No. 5 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 5 CAN Junction Connector) | *b | to Air Conditioning Amplifier Assembly |
*c | to Certification ECU (Smart Key ECU Assembly) | *d | to Headlight ECU Sub-assembly LH |
*e | to Main Body ECU (Multiplex Network Body ECU) | *f | to No. 8 CAN Junction Connector |
*g | to Combination Meter Assembly | *h | to Meter Mirror Sub-assembly (w/ Headup Display System) |
*i | to Multiplex Tilt and Telescopic ECU (w/ Power Tilt and Power Telescopic System) | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
G97-3 (CANH) - G97-14 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Air conditioning amplifier assembly |
G97-4 (CANH) - G97-15 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Certification ECU (smart key ECU assembly) |
G97-5 (CANH) - G97-16 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Headlight ECU sub-assembly LH |
G97-6 (CANH) - G97-17 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Main body ECU (multiplex network body ECU) |
G97-7 (CANH) - G97-18 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 8 CAN junction connector |
G97-8 (CANH) - G97-19 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Combination meter assembly |
G97-9 (CANH) - G97-20 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Meter mirror sub-assembly*1 |
G97-10 (CANH) - G97-21 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Multiplex tilt and telescopic ECU*2 |
Result | Proceed to |
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OK | A |
NG (Line to No. 8 CAN junction connector) | B |
NG (Line to combination meter assembly) | C |
NG (Line to ECU or sensor) | D |
A | REPLACE NO. 5 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 8 CAN JUNCTION CONNECTOR) |
D | GO TO STEP 6 |
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5. | CHECK FOR SHORT IN CAN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) |
(a) Disconnect the G17 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 5 CAN Junction Connector) | *b | to Combination Meter Assembly |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G97-8 (CANH) - G97-19 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
OK | REPLACE COMBINATION METER ASSEMBLY |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) |
6. | CHECK FOR SHORT IN CAN BUS LINES (ECU OR SENSOR) |
(a) Reconnect all wire harness connectors.
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.
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(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
HINT:
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OK | REPLACE ECU OR SENSOR |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |